# CHARLESS LAW VolumeTemperature Relationship Charless Law Charless Law

• Slides: 7

CHARLES’S LAW Volume-Temperature Relationship

Charles’s Law • Charles’s Law: the volume of a fixed mass of gas at a constant pressure varies directly with the Kelvin temperature. • This means that if you increase the temperature of the gas, the volume will also increase. • Likewise, if you decrease the temperature of the gas, the volume will also decrease.

Charles’s Law • You can understand this relationship if you think about what is happening to the particles in the container. • If you add more kinetic energy to the particles (increase the temperature), they will be moving faster and farther apart, therefore increasing the volume. • If the particles lose kinetic energy (decrease the temperature), the particles will be moving slower and closer together, therefore decreasing the volume. • What do you think will happen if you put a balloon filled with gas in a freezer? In an oven?

Brain Break: Traffic Light • Green light: jog in place as fast as you can OR squat jumps • Yellow light: march in place OR lunges • Red light: 4 deep breaths (count of 3) in and out

Equation: • We can represent this relationship in an equation: V 1/T 1=V 2/T 2 • Steps: 1. Figure out the known variables and what you are trying to find. 2. Convert your temperature to Kelvin. 3. Plug in your known variables and solve for the unknown. 4. Make sure you include the unit!

Example: • A sample of neon gas occupies a volume of 752 m. L at 298 K. What volume will the gas occupy at 323 K if the pressure remains constant?

Example: • A sample of Nitrogen gas is contained in a piston with a freely moving cylinder. At 273 K, the volume of gas is 375 m. L. To what temperature must the gas be heated to occupy a volume of 500. 00 m. L?